The study was conducted to determine whether yoga practice during postpartum period has effects on weight reduction, body alignment, and physical self-description. A total of 30 women between postpartum period of 8 and 16 weeks volunteered to participate in this study. Fifteen women participated in 12 weeks of postpartum yoga classes twice a week for 50 minutes per session (yoga group: YG) while others did not (control group: CG). The yoga class was specifically designed to help with various postpartum conditions. A rubber ball diameter of 20cm was used. Subject's body weight, 4 sites of skin fold thickness, and 4 sites of circumferences were measured. Body mass index (BMI), percent body fat (%BF), fat mass (FM), lean body mass (LBM), and waist-to-hip ratio (WHR) were calculated. The photo of anterior view was taken with vertical reference at the commence, 6th week, and the end of the study. The photo was used to assess the tilt angle of shoulder (drew a line between acromions) and pelvis (drew a line between anterior superior illiac spines) against the reference. Physical self-description was evaluated using a questionnaire at the beginning and the end of the study. One participant from each group dropped out of study. Finally, 28 participant's data was used to see the outcome of the study using IBM SPSS statistics version 20. Repeated Measured ANOVA was used. The average %BF of YG was reduced by 3.04% (from 25.94±5.44 to 22.90±5.01%) whereas that of CG was reduced by 0.87% (from 26.55±5.28 to 25.68±5.42%) (p〈0.05). The average LBM of YG was increased by 1.32 kg (from 40.74±3.38 to 42.06±4.22kg) while that of CG was decreased by 0.63 kg (from 43.00±4.17 to 42.37±3.86 kg) (p〈0.05). The body weight, BMI, FM, WHR and shoulder and pelvis tilt angle did not change significantly in both groups. The perceived health (from 4.23±1.08 to 3.05±0.8 in YG and from 4.30±0.98 to 3.29±0.98 in CG), self-esteem (from 5.06±0.41 to 3.97±0.63 in YG and from 5.50±0.80 to 4.27±0.76 in CG), and general physical concept (no significant change in YG and from 3.52±0.89 to 3.54±0.95 in CG) decreased significantly (p〈0.05). Weight was not decreased significantly with postpartum yoga practice, but it had positive effect on body composition which was an identifying factor of better health in the future. Yoga can be an alternative mode in controlling the postpartum body composition. Although yoga practice was not found to be effective on changing one's posture to be more bilaterally symmetric, this may need to be studied further.